Ventilation duct joint



FIG. 1 is a perspective view of ventilation duct joint showing our design according to a first embodiment;

FIG. 2 is a front view thereof;

FIG. 3 is a rear view thereof;

FIG. 4 is a top view thereof;

FIG. 5 is a bottom view thereof;

FIG. 6 is a left side view thereof; and,

FIG. 7 is a right side view thereof.

The broken lines shown herein are for illustrative purposes only and form no part of the claimed design. 

CLAIM The ornamental design for ventilation duct joint, as shown and described. 